Manufacture of electric lamps



Jan. 6, 1948.

J. w. JUVINALL. 2,434,165

MANUFACTURE OF ELECTRIC LAMPS Filed Aug. 18, 1945 s Sheets-Shet 3 A TTOR/Vf) Patented Jan. 6, 1 948 2,434,165 MANUFACTURE OF ELECTRIC LAMPS James W. Juvinall, La Grange Park, 111., assignor to Western Electric Company,

Incorporated,

New York, N. Y., a corporation of New York Application August 18, 1943, Serial No. 499,069 6 Claims; (01. 140-71.6)

This invention relates to the manufacture of electric lamps, and more particularly to an apparatus for mounting coiled filaments on the filament supporting wires of electric lamp stems.

Objects of the invention are to provide an improved, inexpensive and eflicient apparatus for attaching filaments to the filament supporting wires of electric lamp stems or the like.

In accordance with one embodiment of the invention, an apparatus for mounting coiled lamp filaments is provided in which a continuous string of coiled filaments is fed downwardly from a supply thereof into a fixture in which a lamp stem is positioned with the two filament supporting wires extending horizontally therefrom so that the hooked end portions thereof are positioned to receive the end portion of the lowermost filament, the ends of which are manually inserted into the hook portions of the filament supporting wires, after which the hook portions are compressed and thereby clamped to the filament by means of upper and lower compressing members. The upper compressing member is formed with a cutting edge which is adapted to sever the mounted filament from the continuous string thereof.

Other features and advantages of the invention will become apparent from the following detailed description when read in conjunction with the accompanying drawings, in which 'Fig. 1 is an enlarged plan view, partly broken away, of an apparatus embodying the invention;

Figs. 2 and 2A together constitute an enlarged side elevational View of the apparatus;

Fig. 3 is an enlarged front elevational view thereof;

Fig. 4 is a fragmentary vertical section on line 4-4 of Fig. 1;

Fig. 5 is a front elevational view, partly in section, of a portion of the'structure shown in Fig. 3 with the clamping jaws shown in closed positions;

Fig. 6 is an enlarged detail view of a the structure shown in Fig. 5;

Fig. '7 is a detail sectional view on line 'I-! of Fig. 6;

Fig. 8 is an enlarged detail sectional view of portions of the filament clamping and severing elements;

portion of Fig. 9 is a fragmentary sectional view on line 9-9 of Fig. 3;

Fig. 10 is a sectional view on line Ill-40 of Fig. 3;

Fig. 11 is a perspective view of a portion of a lamp stem assembly showing the filament supporting wires, and

Fig, 12 is a perspective view of the same stem assembly with a coiled filament mounted between the filament supporting wires thereof by the apparatus of the present invention.

The apparatus illustrated in the drawings is particularly suitable for use in attaching coiled lamp filaments l5 (Fig. 12) to the filament supporting wires l6, l6 of a lamp stem l8. As shown in Fig. 11, the filament supporting wires have hooked end portions l9, l9 in which the ends of the filament are securely clamped.

Referring to the drawings, the apparatus comprises a main supporting block 23 which is formed with apertured base flanges 2| and 22 (Fig, 10) for attachment to a suitable table or work bench 23, only a portion of which is shown. Above the block 20, a plate 25 is hinged at its rear end on a horizontal pintle 26 mounted in brackets 21, 21 formed integrally with the block. The forward end of the plate is urged upwardly by a coil spring 23, and adjustable stop screws 29 (Figs. 3., 2 and 3) limits the upward movement of the plate under the force of the spring. 7

Pivoted intermediate their ends on the pintle 26 are two clamping levers 3| and 32 (Figs. 2 and 9) which are formed at their forward ends with clamping jaws 33 and 34, respectively, adapted to cooperate with opposed jaws 35 and 36 formed on block 23 and plate 25, respectively. At their rear ends, the clamping levers are interconnected by a coil spring 38 which serves to urge the clamping jaws 33 and 34 toward the jaws 35 and 36, respectively. A spring-pressed latch bar 40 (Fig. 4) is provided for holding the clamping jaws in their'open or retracted positions against the opposing force of spring 38. This latch bar is mounted in a vertical slide 42 and is formed with spaced holding jaws 44 and 45 for engaging the clamping levers ing jaws 33 and 34 in their open positions, as shown in Figs. 3 and 9. The latch bar is provided with an extension 41 by means of which it is manually retractable against the opposing force of its actuating spring 48 to thereby release the clamping levers from the holding jaws 44 and 45. Upon being released from the holding jaws of.

the latch bar 43, the forward ends of the clamping levers are spread apart under the tension of the spring 38 which urges the clamping jaws33 and 34 toward the opposed laws 35 and 36, respectively. The space between these latter jaws may be increased or decreased by simply turning the stop screw 29 to raise or lower the forward end of the hinged plate per jaw 36.

3i and 32 to hold the clamp- 25 which carries the up means ror severing said filament from a continuous string of filaments.

2. An apparatus for mounting filaments, comprising two pairs of clamping members for predeterminedly positioning and holding the two filament supporting wires of a lamp stem, means for compressing hook portions of said wires upon opposite ends of a filament, said last mentioned means comprising two reoiprocatory compressing members, one for each wire, and a common means for adjusting said clamping members and said compressing members for the mounting of filaments of various lengths.

3. An apparatus for mounting filaments, comprising two pairs of clamping members for predeterminedly positioning and holding the two filament supporting wires of a lamp stem, means for adjusting said clamping members for the mounting of filaments of various lengths, means for attaching the clamped filament supporting wires to opposite ends of a filament, and means actuated by the adjusting means for holding a lamp stem centered with respect to the pairs of clamping members in their adjusted positions.

4. An apparatus for mounting filaments, comprising two pairs of clamping members for predeterminedly positioning and holding the two filament supporting wires of a lamp stem, means for adjusting said clamping members for the mounting of filaments of various lengths, means for attaching the clamped filament supporting wires to opposite ends of a filament, and means for latching one clamping member of each pair in inoperative position.

5. An apparatus for mounting filaments, comprising two pairs of clamping members for predeterminedly positioning and holding the two filament supporting wires of a lamp stem, means for adjusting said clamping members for the mounting of filaments of various lengths, means for attaching the clamped filament supporting wires to opposite ends of a filament, and manually releasable latching means for latching one clamping member of each pair in inoperative position.

6. An apparatus for mounting filaments, comprising two pairs of clamping members for predeterminedly positioning and holding the two filament supporting wires of a lamp stem, means for adjusting said clamping members for the mounting of filaments of various lengths, means for attaching the clamped filament supporting wires to opposite ends of a filament, means for latching one clamping member of each pair in inoperative position, and mean actuated by the adjusting means for supporting the latching means equidistant from the pairs of clamping means in their adjusted positions.

' JAMES W. JUVINALL.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,655,279 McGowan Jan. 3, 1928 2,327,033 Flaws Aug. 17, 1943 2,085,578 Flaws June 29, 1937 2,107,903 Peters Feb. 8, 1938 2,214,974 Scott Sept. 17, 1940 1,647,624 Higgins Nov. 1, 1927 1,733,882 Illingworth Oct. 29, 1929 2,068,628 Kronenwetter et a1. Jan. 19, 1937 2,181,288 Washburn Nov. 28, 1939 1,733,802 Higgins Oct. 29, 1929 1,733,881 Illingworth Oct. 29, 1929 6, 194. G. KLUMPP 2,434,166

ELECTRIC COOKER Filed June 19, 1945 INVENTOR 0774 08 KLU PR BY E I 5 I ATTORNEY 

